Where does “sisarpuoli” come from?
sisarpuoli (Finnish) comes from Finnish sisar, from Proto-Finnic sesar, from Proto-Balto-Slavic swésō, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.
sisarpuoli (Finnish): Synonym of siskopuoli
Ancestry of “sisarpuoli”, step by step